Which of the following is NOT a sign of overtraining?

In the context of overtraining, increased performance is not a sign associated with this condition. Overtraining occurs when an athlete or individual trains too hard without adequate rest, leading to a decline in performance rather than improvement. Signs of overtraining typically include physical and psychological symptoms such as fatigue, irritability, and an increased risk of injury. These symptoms manifest as the body's way of signaling that it is overwhelmed and not recovering properly.

Increased performance would indicate that the body is adapting well to training stimulus, which is contrary to the concept of overtraining. Instead of improvement in performance, individuals who are overtrained may find that even with continued effort, their performance diminishes. This highlights the importance of balancing training with proper rest and recovery to promote optimal physical condition and performance.